drm-ci: flake test: kms_bw at connected-linear-tiling-1-displays-2160x1440p

[Vignesh Raman]

Hi Maintainers,

There are some flake tests reported for mediatek driver testing in drm-ci.

# Board Name: mt8173-elm-hana
# Failure Rate: 100
# IGT Version: 1.29-g33adea9eb
# Linux Version: 6.13.0-rc2
kms_bw at connected-linear-tiling-1-displays-2160x1440p

command: cd "/igt/libexec/igt-gpu-tools" && 
"/igt/libexec/igt-gpu-tools/kms_bw" "--run-subtest" 
"connected-linear-tiling-1-displays-2160x1440p"
pid: 329
exit status: exit status: 98
stdout:
-------
IGT-Version: 1.29-g33adea9eb (aarch64) (Linux: 6.13.0-rc2-g1f006005ebf8 
aarch64)
Using IGT_SRANDOM=1734348965 for randomisation
Opened device: /dev/dri/card0
Starting subtest: connected-linear-tiling-1-displays-2160x1440p
Stack trace:
   #0 ../lib/igt_core.c:2051 __igt_fail_assert()
   #1 ../lib/igt_pipe_crc.c:236 pipe_crc_new()
   #2 ../tests/kms_bw.c:133 run_test_linear_tiling()
   #3 ../tests/kms_bw.c:295 __igt_unique____real_main264()
   #4 ../tests/kms_bw.c:264 main()
   #5 [__libc_init_first+0x80]
   #6 [__libc_start_main+0x98]
   #7 [_start+0x30]
Subtest connected-linear-tiling-1-displays-2160x1440p: FAIL (0.336s)
stderr:
-------
(kms_bw:329) igt_pipe_crc-CRITICAL: Test assertion failure function 
pipe_crc_new, file ../lib/igt_pipe_crc.c:240:
(kms_bw:329) igt_pipe_crc-CRITICAL: Failed assertion: pipe_crc->ctl_fd != -1
(kms_bw:329) igt_pipe_crc-CRITICAL: Last errno: 2, No such file or directory
Subtest connected-linear-tiling-1-displays-2160x1440p failed.
**** DEBUG ****
(kms_bw:329) DEBUG: Test requirement passed: !(pipe >= num_pipes)
(kms_bw:329) igt_kms-DEBUG: Test requirement passed: plane_idx >= 0 && 
plane_idx < pipe->n_planes
(kms_bw:329) igt_pipe_crc-CRITICAL: Test assertion failure function 
pipe_crc_new, file ../lib/igt_pipe_crc.c:240:
(kms_bw:329) igt_pipe_crc-CRITICAL: Failed assertion: pipe_crc->ctl_fd != -1
(kms_bw:329) igt_pipe_crc-CRITICAL: Last errno: 2, No such file or directory
(kms_bw:329) igt_core-INFO: Stack trace:
(kms_bw:329) igt_core-INFO:   #0 ../lib/igt_core.c:2051 __igt_fail_assert()
(kms_bw:329) igt_core-INFO:   #1 ../lib/igt_pipe_crc.c:236 pipe_crc_new()
(kms_bw:329) igt_core-INFO:   #2 ../tests/kms_bw.c:133 
run_test_linear_tiling()
(kms_bw:329) igt_core-INFO:   #3 ../tests/kms_bw.c:295 
__igt_unique____real_main264()
(kms_bw:329) igt_core-INFO:   #4 ../tests/kms_bw.c:264 main()
(kms_bw:329) igt_core-INFO:   #5 [__libc_init_first+0x80]
(kms_bw:329) igt_core-INFO:   #6 [__libc_start_main+0x98]
(kms_bw:329) igt_core-INFO:   #7 [_start+0x30]
****  END  ****

Pipeline link: 
https://gitlab.freedesktop.org/vigneshraman/linux/-/jobs/68249775

Please could you have a look at these test results and let us know if 
you need more information. Thank you.

Regards,
Vignesh